package cn.tedu.sp11.fallback;

import cn.tedu.sp01.web.Util.JsonResult;
import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

@Component
public class ItemFB implements FallbackProvider {
    //返回一个服务ID,表示是针对这个服务的降级类
    @Override
    public String getRoute() {
        return "item-service";
        //return *=return null,针对所有服务降级

    }

    @Override
    public ClientHttpResponse fallbackResponse(String route, Throwable cause) {
        //降级响应,封装在response对象

        return  new ClientHttpResponse() {
            @Override
            public HttpStatus getStatusCode() throws IOException {
                return HttpStatus.OK;
            }

            @Override
            public int getRawStatusCode() throws IOException {
                return HttpStatus.OK.value();
            }

            @Override
            public String getStatusText() throws IOException {
               return HttpStatus.OK.getReasonPhrase();
            }

            @Override
            public void close() {

            }

            @Override
            public InputStream getBody() throws IOException {
                //jsonresult{code:200,msg:"转发调用商品服务失败",data:null}
                String json = JsonResult
                        .ok()
                        .msg("转发调用商品服务失败")
                        .toString();

                return new ByteArrayInputStream(json.getBytes("UTF-8"));
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders h = new HttpHeaders();
                h.add("Content-Type", "application/json,charset=UTF-8");

                return h;
            }
        };
    }
}
